var mod2 = {
    title: 'Media Player',
    layout: 'border',
    //Make sure IE can still calculate dimensions after a resize when the tab is not active.
    // With display mode, if the tab is rendered but hidden, IE will mess up the layout on show:
    hideMode: Ext.isIE ? 'offsets' : 'display',
    bodyStyle: 'background-image: url('+background_img+');', 
    items:[{
    	title: 'Reproductor Multimedia',
        region: 'west',                
        //collapsible: true,
        autoScroll: true,
        contentEl: 'mediaList',
        width: 200,
        minSize: 100,
        maxSize: 350,
        margins: '5 0 5 5',
        cmargins: '5 5 5 5',
        //html: '',
        bodyStyle:'padding:10px; background-image: url('+background_img+');'
        //split: true
    },{
    	title: 'Media',
    	region: 'center',
    	contentEl: 'media', //Se construye sobre el div con ID: media
    	autoScroll: true,
        //html: 'Nothing to see here.',
        margins: '5 5 5 5',
        bodyStyle:'background-image: url('+background_img+');'
    }]
};	